EP 1086455 A1 20010328 - COMPATIBLE DIGITAL SOUNDTRACKS FOR 70 MM MOTION PICTURE FILM
Title (en)
COMPATIBLE DIGITAL SOUNDTRACKS FOR 70 MM MOTION PICTURE FILM
Title (de)
KOMPATIBLE DIGITALE TONSPUREN FÜR 70MM KINOFILM
Title (fr)
BANDES SON NUMERIQUES COMPATIBLES POUR FILM CINEMATOGRAPHIQUE 70 MM
Publication
Application
Priority
- US 9913337 W 19990611
- US 9838898 A 19980616
Abstract (en)
[origin: WO9966503A1] Dolby Digital and Sony SDDS digital signal carrying optical symbols on large-format motion picture film (e.g., film having any of the various 70 mm formats) are recorded in such a way as to permit existing 35 mm optical readers and signal decoders to recover the soundtracks with little or no modification. The normal format of a motion picture soundtrack in the form of a two-dimensional array of photographically recorded symbols (10) representing digital information intended for application to 35 mm motion picture film is modified by stretching the symbols (10) in the direction in which the motion picture film is transported when played, the degree of stretching being commensurate with the increase in film speed of the large-format motion picture film with respect to said 35 mm motion picture film. The stretched format soundtrack is applied to the large-format motion picture film, whereby when said large-format motion picture film is played the information recovered is essentially the same as the information recovered from 35 mm motion picture film to which the normal format of said motion picture soundtrack is applied.
IPC 1-7
IPC 8 full level
G03B 31/02 (2006.01); G06K 19/06 (2006.01); G11B 7/003 (2006.01); G11B 20/12 (2006.01)
CPC (source: EP US)
G03B 31/02 (2013.01 - EP US); G06K 19/06037 (2013.01 - EP US); G11B 7/0032 (2013.01 - EP US); G11B 20/1261 (2013.01 - EP US)
Citation (search report)
See references of WO 9966503A1
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
WO 9966503 A1 19991223; WO 9966503 A9 20000330; AU 4440099 A 20000105; AU 751229 B2 20020808; DE 69919866 D1 20041007; DE 69919866 T2 20050825; EP 1086455 A1 20010328; EP 1086455 B1 20040901; US 6011610 A 20000104
DOCDB simple family (application)
US 9913337 W 19990611; AU 4440099 A 19990611; DE 69919866 T 19990611; EP 99927513 A 19990611; US 9838898 A 19980616